Respostas
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3.(-12) + 3.(+12) - 9 =
↓ ↓
-36 + 36 - 9 = -9
5.(-1) + 8.(-2) - 1.(-1)=
↓ ↓ ↓
-5 -16 +1 = -20
-2.(+6) + 5.(+3) - 1=
↓ ↓
-12 + 15 - 1 =
↓
3 - 1 = 2
↓ ↓
-36 + 36 - 9 = -9
5.(-1) + 8.(-2) - 1.(-1)=
↓ ↓ ↓
-5 -16 +1 = -20
-2.(+6) + 5.(+3) - 1=
↓ ↓
-12 + 15 - 1 =
↓
3 - 1 = 2
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